Frequencies for first 10,000 rows of esrd_ntwrk_num variable in pos1994 dataset :

       esrd |
  network # |      Freq.     Percent        Cum.
------------+-----------------------------------
            |      9,504       95.04       95.04
         02 |          1        0.01       95.05
         04 |          2        0.02       95.07
         08 |         58        0.58       95.65
         13 |         46        0.46       96.11
         14 |          2        0.02       96.13
         15 |         65        0.65       96.78
         16 |          2        0.02       96.80
         17 |        119        1.19       97.99
         18 |        201        2.01      100.00
------------+-----------------------------------
      Total |     10,000      100.00

by Jean Roth , jroth@nber.org , 17 May 2017